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United States Patent | 5,505,537 |
Previero | April 9, 1996 |
A conical-bottom silo, particularly suitable for small-sized pieces of plastic material with properties of high elasticity, includes a conical screw stirrer inserted axially in the conical bottom of the silo. The conical screw of the stirrer is discontinuous and divided into several sections. The silo has a structure for discharging the material arranged below an outlet port positioned laterally in relation to the stirrer and including two co-operating cylindrical screws. The stirrer can be provided with apertured grill outlets for heated, forced air.
Inventors: | Previero; Flavio (Lipomo, IT) |
Assignee: | Sorema s.r.l. (Erba, IT) |
Appl. No.: | 307755 |
Filed: | September 26, 1994 |
Mar 27, 1992[IT] | MI92A0736 |
Current U.S. Class: | 366/97; 34/182; 366/147; 366/186; 366/196; 366/314; 366/322; 366/323 |
Intern'l Class: | B01F 007/24; B01F 015/02; B01F 015/06 |
Field of Search: | 366/89,90,98,97,102-104,147,186,194-196,314,322,323,318 34/171,173,181,182 |
424808 | Apr., 1890 | McAllister | 34/182. |
1879928 | Sep., 1932 | Eakins | 366/251. |
3339759 | Sep., 1967 | Wellons | 366/186. |
3797550 | Mar., 1974 | Latinen | 366/323. |
4171165 | Oct., 1979 | Card | 366/186. |
4185925 | Jan., 1980 | Gazzoni. | |
Foreign Patent Documents | |||
1572753 | Jun., 1969 | FR. | |
309629 | Nov., 1917 | DE | 366/318. |
1941163 | Feb., 1971 | DE. | |
1535612 | Jan., 1990 | SU | 366/323. |
Patent Abstract of Japan, vol. 013, No. 237 (M833) 5 Jun. 1989 and JP, A, 10 49 605 (Matsui Seisakusho KK) see abstract; figure. Modern Plastics International, vol. 12 No. 12 Dec. 1982, Lausanne, CH p. 65 Werner & Pfleiderer Maschinenfabrik "Unit drys materials while on conveyors." |